Scalable-Group Tag eXchange Protocol (SXP)
draft-smith-kandula-sxp-10
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Network Working Group M. Smith
Internet-Draft R. Kandula
Intended status: Informational S. Appala
Expires: November 25, 2020 Cisco Systems
May 24, 2020
Scalable-Group Tag eXchange Protocol (SXP)
draft-smith-kandula-sxp-10
Abstract
This document discusses scalable-group tag exchange protocol (SXP), a
control protocol to propagate IP address to Scalable Group Tag (SGT)
binding information across network devices.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 25, 2020.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
Smith, et al. Expires November 25, 2020 [Page 1]
Internet-Draft Scalable-Group Tag eXchange Protocol (SXP) May 2020
carefully, as they describe your rights and restrictions with respect
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This document may not be modified, and derivative works of it may not
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. SXP Overview . . . . . . . . . . . . . . . . . . . . . . . . 4
3. SXP Operation . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. SXP Connection Management . . . . . . . . . . . . . . . . 5
3.1.1. SXP Connection . . . . . . . . . . . . . . . . . . . 5
3.1.2. SXP Message integrity/authenticity . . . . . . . . . 6
3.1.3. SXP Connectivity Discovery and Connection Recovery . 7
3.1.4. SXP Connection Setup Sequence . . . . . . . . . . . . 7
3.1.5. SXP Connection States . . . . . . . . . . . . . . . . 8
3.2. Binding Database . . . . . . . . . . . . . . . . . . . . 9
3.2.1. SXP Learned IP-SGT Binding recovery . . . . . . . . . 9
4. Message Formats . . . . . . . . . . . . . . . . . . . . . . . 9
4.1. Bit and Octet Numbering Convention . . . . . . . . . . . 9
4.2. SXP Message Header . . . . . . . . . . . . . . . . . . . 10
4.3. Attribute Formats . . . . . . . . . . . . . . . . . . . . 10
4.4. SXP OPEN and OPEN_RESP Message . . . . . . . . . . . . . 13
4.4.1. Node-ID . . . . . . . . . . . . . . . . . . . . . . . 14
4.4.2. Capabilities Advertisement . . . . . . . . . . . . . 14
4.4.3. Keep-alive and Hold Time Negotiation . . . . . . . . 17
4.5. SXP UPDATE Message . . . . . . . . . . . . . . . . . . . 22
4.5.1. UPDATE Attributes . . . . . . . . . . . . . . . . . . 23
4.5.2. UPDATE Message Samples . . . . . . . . . . . . . . . 32
4.6. SXP ERROR Message . . . . . . . . . . . . . . . . . . . . 35
4.6.1. Error Codes . . . . . . . . . . . . . . . . . . . . . 36
4.7. SXP PURGE-ALL Message . . . . . . . . . . . . . . . . . . 37
4.8. SXP KEEPALIVE Message . . . . . . . . . . . . . . . . . . 37
5. Update Message Handling . . . . . . . . . . . . . . . . . . . 37
5.1. UPDATE Message Validation . . . . . . . . . . . . . . . . 37
5.2. UPDATE Message processing . . . . . . . . . . . . . . . . 39
5.3. Generating UPDATE Message . . . . . . . . . . . . . . . . 43
6. SXP Failure Scenarios . . . . . . . . . . . . . . . . . . . . 44
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